Machine for grinding balls



No. 609,2l8. Y Patented Aug'. I6, |898.

R. H. WHITE.

MACHINE FOR GHINDING BALLS.

(Application iled June 14, 1897.) (No Model.)

Q@ @a i? its tric.4

ROLLIN I'I. WHITE, OF CLEVELAND, OI-IIO.

MACHINE FOR GRINVDING BALLS. E

SPECIFICATION formingpart of Letters Patent N0. 609,218, dated August 16, 1898. Application filed June 14, 1897. Serial No. 640,614. (No model.)

Balls; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain improvements in ball-grindin g machines; and its main obJ ect is to provide an efficient machine wherein the balls may be finally ground to the proper size and perfect form and smoothly polished in a mixture of oil and emery or like substance.

The invention consists in certain novel features and combinations of parts hereinafter described, and pointed out definitely in the claims.

In the drawings, Figure l is a side elevation, partly in section, of a machine embodying my invention. Fig. 2 is a plan view of the plate D, and Fig. 3 is perspective View of one of the clamp-stops.

Referring to the parts by letters, A represents the table or bed of the machine, and F represents the bracket-standard, in which is journaled a vertical shaft B.

C represents a tubular cylindrical grinder, which may be made of castiron,which is secured to the lower end of shaft B. This shaft ought to be vertically movable a short distance, and any suitable means for so moving it may be provided. The means shown in the drawings consist of the following parts: The shaft is embraced by a sleeve E, whichis eX- ternally threaded. A hand-wheel J, which fits in ahorizontal slot in the bracket f, screws onto this sleeve. The sleeve is prevented from revolving by a tongue f', which enters a vertical groove inthe sleeve. Y This sleeve fits between a collar b on shaft B and the top of the grinder. Preferably antifriction -balls are interposed between the top of sleeve E and the collar b and between the bottom of the sleeve and the grinder C. Obviously the turning of hand-wheel J raises or lowers sleeve E, and the movement up or down of this sleeve produces a like movement of the shaft B.

D represents a plate which rests upon the table A below the grinder. In its top surface is an annular channel d, and in the bottom of this channel is an annular ball-groove d'. In vertical radial section this groove d' is seen to be particylindrical, less 4than semicylindrical. i

. The plate D is preferably slidable from beneath the grinders, so that the balls may be inserted and removed from the groove d. In

`suchlcase stops and clamps are provided for fixing the position of the plate beneath the grinder andfor holding it. Two stops g g may be permanently fixed to the" table, and a flange d2 on the lower edge of the plateD will engage with them. The clamp g2 may be secured to the table by a bolt g3, which permits its easy removal. These stops and clamps are so placed that when the plate D is in engagement with them the ball-groove CZ', which is preferably circular,is eccentric to the grinder. In the best construction this groove d is also eccentric to the channel d, which channel in such case is concentric with the grinder.

In the operation of the machine the groove d is lled with balls, and the plate D is then pushed to and secured in the proper position beneath the' grinder. The grinder is then lowered until it bears with the proper pressure upon the balls. The channeld is filled with a mixture of oil and emery. The grinder is rotated in contact with the balls,

vwhich are thereby turned in all directions as they are moved aroundin groove d.

One advantage in having the channel d concentric with the grinder is that the grinder can project into the said channel, whereby the balls will be entirely buried in the oil and emery. The machine will be operative, however, if the channel d and the groove d are concentric, provided the plate D is placed in such'position that the groove d' is eccentric to the grinder.

The shaft B may be driven by any suitable means-as, for example, by the belt l-I, which engages with a pulley b3, which is connected with the shaft by a tongue and groove which will permit the shaft to slide through it.

I-Iaving described my invention, I claim- 1. In a machine for grinding balls, in combination, a grinder rotatable upon a vertical axis and having a plane grinding-face, ahorizontal plate below said grinder having in its upper face a recess adapted to contain a mixture of oil and emery or like substance and having in the bottom of said recess a ballgroove which, when the parts are in operative position, is not concentric to the grinder, substantially as and for the purpose specified.

2. In a machine for grinding balls, in combination, a rotatable tubular grinder, a plate, below said grinder, having in its top surface a circular channel concentric with said grinder, and having in the bottom of said channel a ball-groove which is eccentric to said grinder and channel, substantially as and for the purpose specified.

3. In a machine for grinding balls, in combination, a grinder rotatable upon a vertical axis, a table below said grinder, a plate slidable upon said table, which plate has in its upper surface an annular channel, and in the bottomA of said channel an annular groove which is eccentric to the grinder, and guidestops on the table for determining the position of the plate relative to the grinder substantially as and for the purpose specified.

4. In a machine for grinding balls, in combination, a rotatable tubular grinder, a table below the grinder, a plate slidable upon said table, stops and a clamp for iixing the position'of the plate relative to the grinder, said plate having, in its top surface, a circular grinder verticallyT to permit the withdrawal of the plate from beneath the grinder, substantially as and for the purpose speciiied.

5. In a machine for grinding balls, a horizontal plate having, in its top surface, a circular channel, and in the bottom of said channel a circular ball-groove eccentric to said channel, substantially as and for the purpose specified.

6. In a machine for grinding balls, in combination, a grinder rotatable upon a vertical axis and having a flat grinding-surface, a substantially horizontal bed below said grinder, a plate movable upon said bed and havingin its top a recess adapted to contain a mixture of oil and emery or like substance, and having in the bottom of said recess an endless ball-groove which, when the parts are in operative relation, is not a circle concentric With the axis of the grinder, substantially as and y for the purpose specified.

In testimony whereof I affix my signature in presence of two Witnesses.

ROLLIN H. YVHITE. Witnesses:

E. L. THURsToN, ALBERT H. BATES. 

